Effect of stimulated emission on the transport characteristics of terahertz quantum-cascade lasers

被引：8
作者：
Sharma, R. [1 ]
Schrottke, L. [1 ]
Wienold, M. [1 ]
Biermann, K. [1 ]
Hey, R. [1 ]
Grahn, H. T. [1 ]
机构：
[1] Paul Drude Inst Festkorperelekt, D-10117 Berlin, Germany
来源：
APPLIED PHYSICS LETTERS | 2011年 / 99卷 / 15期
关键词：
current density; quantum cascade lasers; stimulated emission; submillimetre wave lasers;
D O I：
10.1063/1.3653262
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
We investigate the effect of stimulated emission on the transport characteristics of terahertz quantum-cascade lasers operating in a frequency range between 4.3 and 4.6 THz. The impact of stimulated emission is varied by changing the mirror losses via damaging one or two facets. In the case of voltage-driven measurements, a reduction in the current density near the onset of stimulated emission is observed for the facet-damaged lasers as compared to the original one. The measurements are in qualitative agreement with results of numerical simulations including the effect of stimulated emission. (C) 2011 American Institute of Physics. [doi:10.1063/1.3653262]
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页数：3
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